Economic Importance of Bacteria and Fungi — Flashcards

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Bacteria are unicellular prokaryotes without a true nucleus and no chlorophyll. They are very small, usually about 2 micrometres long and 0.5 micrometre thick. They are not classified as plants in the…

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Bacteria are not classified as plants because they have no chlorophyll and their mode of nutrition is heterotrophic, not autotrophic. This makes them different from green plants, even though they may …

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The main shapes of bacteria are cocci, bacilli, spirilla and vibrio. Cocci are spherical, bacilli are rod-shaped, spirilla are spiral or twisted, and vibrio are comma-shaped.

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Diplococci are bacteria occurring in pairs, streptococci occur in long chains, and staphylococci occur in clusters. These terms describe how bacterial cells are arranged.

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A bacterial cell has a cell wall made of peptidoglycan, a cell membrane, cytoplasm, and chromatin material. The chromatin material is a single circle, not enclosed in a nuclear membrane, and is attach…

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Most bacteria do not move by themselves, but some have one or more flagella. Flagella help them move actively in liquid environments.

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Most bacteria are heterotrophic because they have no chlorophyll. They may be saprotrophic, feeding on dead and decaying matter, or parasitic, feeding on living hosts.

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Some bacteria respire with oxygen and are called aerobic bacteria. Others do not need free oxygen and are called anaerobic bacteria. Anaerobic bacteria are killed if exposed to air.